High School

We appreciate your visit to A weak acid is titrated to the equivalence point with 24 6 mL of strong base At what volume of added base does pH pKa. This page offers clear insights and highlights the essential aspects of the topic. Our goal is to provide a helpful and engaging learning experience. Explore the content and find the answers you need!

A weak acid is titrated to the equivalence point with 24.6 mL of strong base. At what volume of added base does pH = pKa?

1) 0 mL
2) 12.3 mL
3) 24.6 mL
4) 36.9 mL

Answer :

Final answer:

At the half-equivalence point of a titration involving a weak acid and a strong base, the pH equals pKa, which occurs at 12.3 mL of the added base since this is half of the volume at the equivalence point.

Explanation:

The pH of a solution at which the concentration of the weak acid is equal to the concentration of its conjugate base is known as the half-equivalence point. At this point, pH is equal to pKa.

Since the equivalence point in this titration occurs at 24.6 mL of strong base, the half-equivalence point would be half that volume, at 12.3 mL.

Therefore, the pH equals pKa at 12.3 mL of added base.

In a titration involving a weak acid and a strong base, the point where pH = pKa is precisely when half the amount of base required to reach the equivalence point has been added because half of the weak acid has been neutralized to form its conjugate base, resulting in the formation of a buffer system.

Thanks for taking the time to read A weak acid is titrated to the equivalence point with 24 6 mL of strong base At what volume of added base does pH pKa. We hope the insights shared have been valuable and enhanced your understanding of the topic. Don�t hesitate to browse our website for more informative and engaging content!

Rewritten by : Barada